alpha-agonists
Alpha-agonists are a class of medications that stimulate alpha-adrenergic receptors in the body. These receptors are part of the nervous system and play a role in regulating various physiological functions, such as blood pressure and blood flow. By activating these receptors, alpha-agonists can cause blood vessels to constrict, leading to increased blood pressure and reduced nasal congestion.
Commonly used alpha-agonists include clonidine and phenylephrine. Clonidine is often prescribed for high blood pressure and attention deficit hyperactivity disorder (ADHD), while phenylephrine is frequently found in over-the-counter cold and allergy medications to relieve nasal congestion.